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Reflection and Refraction

The document discusses reflection and refraction of light, including the law of reflection which states that the angle of incidence equals the angle of reflection. It also describes how a plane mirror produces a virtual image that is upright, laterally inverted, and the same size as the object. The document concludes by explaining refraction is the bending of light that occurs when it passes from one medium to another with different densities.

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50 views16 pages

Reflection and Refraction

The document discusses reflection and refraction of light, including the law of reflection which states that the angle of incidence equals the angle of reflection. It also describes how a plane mirror produces a virtual image that is upright, laterally inverted, and the same size as the object. The document concludes by explaining refraction is the bending of light that occurs when it passes from one medium to another with different densities.

Uploaded by

kerminaaboualsaad
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPT, PDF, TXT or read online on Scribd
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Reflection and Refraction

page 65
Objectives :
1) Formulate the law of reflection
2) Describe an image produced by a plane
mirror.
3) Describe an experimental demonstration of
the refraction of light
http://micro.magnet.fsu.edu/primer/java/reflection/specular/specularjavafigure1.jpg
Specular Reflection
• A reflection produced by a smooth
surface.
Diffuse Reflection
• Reflection from a rough surface.
Clear vs. Diffuse Reflection

• Smooth, shiny
surfaces have a
clear reflection:

Rough, dull surfaces have a diffuse


reflection.

Diffuse reflection is when light is scattered


in different directions
Reflection
• Reflection from a mirror:

Normal

Incident ray Reflected ray

Angle of Angle of
incidence reflection

Mirror
Law of Reflection
Angle of incidence = Angle of reflection
Note
• The angle of incidence is formed
between the incident ray and the
normal.

• The angle of reflection is formed


between the reflected ray and the
normal.
Reflection from a Plane Mirror

di=do
hi=ho
Describe an image produced
by a plane mirror
1) Upright

2) The same size as object


Describe an image produced
by a plane mirror
3) The same distance from the mirror

4) Laterally inverted (left becomes


right and right becomes left)
Type of Image
5) Image is virtual

Real image: can be collected on


screen

Virtual image: can’t be collected on a


screen
Refraction
• Refraction: is bending of light

• When a light is travel between


Medium 1 and Medium 2, the light
changes direction because it changes
velocity.
• Medium : is any Matter that light or
any other wave travels through it.
Refraction
Incident ray
at 90 to
Incident glass
ray

Air

Glass

Ray bends Not


towards the Refracted refracted
normal ray

Ray bends away


from the normal
The Refraction of Light
Refraction can make objects immersed in water appear broken, and can create
mirages.

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